Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93c7d7b97ffa080…

MALICIOUS

PDF

81.0 KB Created: 2021-03-25 10:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 46ab1978809322d7f7a981907bcfd090 SHA-1: cf114847a3f755ba85da903c3b23021e7be77a3f SHA-256: f93c7d7b97ffa080e0bade9210b82afa1271c08db522ef4fc45788a4e52a743f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, identified as a link farm hosted on disposable domains. The primary URL, https://lozipotod.ru/wix?keyword=business+communication+process+and+product+8th+edition+pdf+free, suggests a lure related to finding a specific book. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/wix?keyword=business+communication+process+and+product+8th+edition+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471083/normal_60187275d5ee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412599/normal_602858646b260.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/382372.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381091/normal_5fe55f3118f0c.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/f82c062ffa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_60211316c1920.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464072/normal_60049f80b5a7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470532/normal_60046e2986560.pdfIn PDF document text
    • https://zidadosivifaju.weebly.com/uploads/1/3/0/7/130775619/xerus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0c472ef-1e07-4c59-b686-208985a33fab/wings_of_fire_book_13_read_online_free.pdfIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_b51bf078f6e8435ca1b8e5cce05eea02.pdf?index=trueIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_04b9ed1eb85246ef8a7fd7c5aaf30ebe.pdf?index=trueIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_36c11e3e7871499798e5ad64221279f0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9429afb7-1b42-4fe1-91b5-5e957e72967c/tipos_de_comunicaciones_electrnicas_en_la_actualidad.pdfIn PDF document text
    • https://10bc5e17-7652-4c7e-9b43-999b3eb3b021.filesusr.com/ugd/5edc69_00c39da391d542dab5e47ca3c06f86c4.pdf?index=trueIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_749c3a8b630241bfa43f32ac117f4771.pdf?index=trueIn PDF document text
    • https://7fc064a1-7d03-4d1b-8e05-e20e0f6acf4e.filesusr.com/ugd/f64db8_b9bef66530f24bbabf0a9066f1fc933d.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 5608 bytes
SHA-256: f267af358201bb08512892bbaf87b8fe5130ded27a37ae2da72c12f1158790e6
font_01_sfnt_off000112c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C2 10420 bytes
SHA-256: 9b83159f93f416b85bb6612ceeda3fddbd1d608ac9a18e73f1518a7dabf92e39